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Aviation History
1928
1928 - 0073.PDF
Flight, February 2, 1928 HT ZURCWKFTENGINEEFL First Aeronautical Weekly in the World. Founded January, 1909 Founder and Editor : STANLEY SPOONER A Journal devoted to the Interests, Practice, and Progress of Aerial Locomotion and Transport OFFICIAL ORGAN OF THE ROYAL AERO CLUB OF THE UNITED KINGDOM No. 997. (No. 5. Vol. XX.) FEBRUARY 2, 1928 -Weekly, Price 6d.I Post free, 7d. FligHt The Aircraft Engineer and Airships Editorial Offices: 36, GREAT QUEEN STREET, KINGSWAY, W.C.2. Telephone : Gerrard 1828. Telegrams : Truditur, Westcent, London. Annual Subscription Rates, Post Free. United Kingdom .. 30s. id. Abroad .. .. 33s 0d* 'Foreign subscriptions must be remitted in British currency. CONTENTS Editorial Comment: PAGE Noise .. .. .. 61 And Silence 62 Westland " Westbury " 3 Napier Racing Engine .. .. .. .. .. .. .. 65 Bristol Mercury Engine . . .. .. .. .. .. .. 65 Schneider Machine Design .. .. .. . . .. .. 66 Private Flying : An Aero Club for Liverpool.. .. .. .. 68 Light 'Plane Clubs 70 Airisms from the Four Winds .. .. .. .. .. • • 71 Short Brothers at Play 2 Royal Air Force .. .. .. .. .. .. .. • • 73 Royal Aeronautical Society and Inst.Ae. Engineers .. .. .. 73 Westland Aircraft Society 73 Notices to Airmen .. .. .. .. .. .. •• 74 " FLIGHT " PHOTOGRAPHS. To those desirous of obtaining copies of "Flight" Photographs, these can be supplied, enlarged or otherwise, upon application to Photo. Department, 36, Great Queen Street, W.C.2 For Sizes and Prices, see Advert, on page i. DIARY OF CURRENT AND FORTHCOMING EVENTS Club Secretaries and others desirous of announcing the dates of important fixtures are invited to send particulars for inclusion in this list :— 1928 Feb. 2 Fob. 7 Feb. 16 Mar. 1 " Ground Transport for an Air Organisation."' Flt.-Lieut, R. E. H. Allen, before R.Ae.S. & Inst.Ae.E." The Maintenance and Repair of Aero Engines." Wing-Corn. 3. G. V. Fowler, Joint Meeting R.Ae.S. & Inst.Ae.E., and Inst.A.E. " Experiments on Model Airscrews at High Tip Speeds." Mr. G. P. Douglas, before R.Ae.S. & Inst.Ae.E. " Experiences with the Baghdad Air Mail. Wing-Com. R. M. Hill, before R.Ae.S. & Inst.Ae.E. EDITORIAL COMMENT HE paper read before the R.Ae.S. and I.Ae.E., on January 19, by Dr. W. S. Tucker, and entitled " The Problem of Noise in Civil Aircraft, and the Possibili- ties of its Elimination," dealt with a subject, the importance of which is not always recognised. The lecturer treated his subject in a very scientific manner, and we do not propose here to go into the science of sound propagation as dealt with by Dr. Tucker. His general statements and conclusions, Noise however, deserve to be given serious attention, for unless and until we suc- ceed in getting rid of the more objectionable part of the noise, or at least of its effects, it is quite certain that many who would otherwise use the air services will refrain from doing so owing to the unpleasant effects of sitting for hours in a din, which in most of the machines now in use (we are not confining our remarks to British machines only) very quickly becomes a severe strain on the nervous system. Dr. Tucker placed first in the list of offenders the noise of the engine exhaust, and expressed the view that it was probably immaterial whether the engine was of radial, in-line or Vee type. Accepting the view that the engine exhaust is the most prominent of the noises, that is probably true. But with all due respect to the lecturer, we rather doubt whether that is the case. Valve rockers, propeller noises, and the sounds produced by the air rushing past sharp edges appear to us to be at least as bad offenders. There should not be any real difficulty in obtaining com- paratively effective silencing of the exhaust. To do so will undoubtedly, as Dr. Tucker pointed out, mean additional weight. There is another side to the question, which is also serious from the operator's point of view. We believe it to be a fact that the exhaust collector system of one well-known radial engine costs as much as an " Austin 7 " car ! On a three-engined machine the figure becomes a not unimportant item. Propeller noises are probably worse in the case of those with high tip speeds, although the geared engine usually drives a propeller of greater diameter, and therefore the tip speeds may again approach those B 2
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